Title :
A simple open-circuit fault detection method for a fault-tolerant DC/DC converter
Author :
Soon, John Long ; Lu, Dylan Dah-Chuan
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia
Abstract :
This paper presents a two-switch step-down converter topology with fault tolerant capability. The proposed fault detection method uses the source-to-ground voltage of the floating MOSFET to identify the fault. If an open-circuit fault on the MOSFET occurs, the source voltage will become zero. The micro-controller which detects the fault will activate an alternative path through another MOSFET to maintain converter output regulation. The redundancy concept which is applied to this topology uses the same output inductor and capacitor to operate the converter in buck mode during normal operation and in buck-boost mode after fault. Experimental results are reported to confirm the design and demonstrate the fault tolerant operation.
Keywords :
DC-DC power convertors; MOSFET; circuit reliability; fault diagnosis; fault tolerance; inductors; microcontrollers; network synthesis; redundancy; buck-boost mode operation; fault identification; fault tolerant DC-DC converter capability; floating MOSFET source-to-ground voltage; microcontroller redundancy; open-circuit fault detection method; output inductor; two-switch step-down converter topology; Capacitors; Circuit faults; Fault detection; Fault tolerance; Fault tolerant systems; MOSFET; Voltage measurement; dc/dc converter; fault detection measurement; fault-tolerant; redundancy design;
Conference_Titel :
Power Electronics and Drive Systems (PEDS), 2015 IEEE 11th International Conference on
Conference_Location :
Sydney, NSW
DOI :
10.1109/PEDS.2015.7203511